Did you know that prior to 1940, chickens were basically skeletons only good for producing miniscule eggs?
It wasn't until the late 1940's that chickens finally gathered the motivation and self esteem to work out and eat a freaking hamburger every once in a while that they began to bulk up. This allowed them to finally be useful to farmers that, up until that point, were just taking care of the chickens out of pity.